How to add parent prims for exported materials when using Arnold Export?

[frankchen211]

If it is possible to have parent prims to hold Material primss just like MayaUsd Export - all materials are under mtl prim by default.

[sebastienblor]

Sorry, I'm not sure to understand. Do you want materials to be under "mtl" or you don't want that ?
Since a few months we are always exporting materials under a "mtl" scope, like MayaUSD does, to be consistent with the industry.

Which version are you testing ?